Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf89ffeb9e20e572…

MALICIOUS

PDF

47.0 KB Created: 2021-09-27 19:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1838f63350712c81160897690794cbf1 SHA-1: 85257e6a71ba499642191b220813c61bc18eaf08 SHA-256: bf89ffeb9e20e572f53d30ec033b17b9b68708d0c69f363cd6fcd909361d969a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains numerous external URIs and links to websites, many of which are hosted on compromised WordPress installations. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. The file's structure suggests it functions as a link farm to obscure the ultimate destination of the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6441

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://queure.ru/uplcv?utm_term=insta+down+apk PDF link annotation
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16143008d13bde---14223632121.pdfIn PDF document text
    • http://tuzoltosagmihald.hu/userfiles/file/82194156943.pdfIn PDF document text
    • http://origo.ws/userfiles/file/24399907157.pdfIn PDF document text
    • https://buyafranchise.org/files/files/kibozikaxujilesifowo.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/36173236066.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/161418caa80d9c---metinupatujuwewonaka.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161509bbc2e5a2---24812116236.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/zefopofiwepokavenedej.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/93445309572.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdfe8542eb---42983283948.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/5b52ecb04caa87fc27eff142ec800ba4/16217120332.pdfIn PDF document text
    • http://jlicentral.com/images/authors/file/73509301174.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/57rtu7inefuqa12o88ua50vpj3/6659065326.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/datekapun.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f821bd0d54---jumok.pdfIn PDF document text
    • https://xrtradingfeedback.com/cmsimages/file/bilakazafugerowukax.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/zebekagegurajolodagigitu.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name/files/27176286669.pdfIn PDF document text
    • http://ingegnasrl.com/userfiles/files/zawikajitememupatozazosu.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/gavelabiw.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/39119457193.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/dugurugejuzad.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/3ebb58dcca17f26fc1eba39ac88629fc/76343922624.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/2f56030d77b143108e5c6cd613edc091/jizukifuwedekokanazojoxaj.pdfIn PDF document text

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